mirror of
https://gitlab.gnome.org/GNOME/eog
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905a8b5d28
New eog architecture. Moved more stuff into libeog and basically merged image-view.[ch] and ui-image.[ch]. The result is eog-scroll-view.[ch]. * libeog/ui-image.[ch], * libeog/image-view.[ch]: Removed. * libeog/eog-scroll-view.[ch]: New, basic widget for displaying an EogImage. * libeog/eog-image-helper.[ch], * libeog/eog-image.[ch]: Image model, provides all operations on an image. * libeog/eog-full-screen.[ch]: Moved from viewer. Uses a EogScrollView widget for displaying the image. * libeog/libeog-marshal.list: New, list of callback marshallers. * libeog/Makefile.am: SOURES file list updated, added libeog-marshal.[ch] generation. * libeog/accessible-image-view.[ch]: Use EogScrollView instead of ImageView. Fixed indention. * libeog/eog-pixbuf-util.c (eog_pixbuf_flip_vertical): Free pixbuf. * libeog/eog-pixbuf-util.h: Added include guards. * libeog/zoom.[ch] (zoom_image_has_standard_size): Removed. * viewer/Makefile.am (SOURCES): Removed everything except main.c and eog-image-view.[ch] * viewer/eog-image-view.[ch]: Rewritten. This bonobo object serves as a simple wrapper for an EogScrollView and EogImage and provides onyl gui and glue code. It implements the PersistFile, Control and Zoomable interfaces. * viewer/main.c (eog_image_viewer_factory): Removed EogImage bonobo stuff. * shell/eog-window.c (sb_policy_changed): Removed. (eog_window_init): Don't register for policy changes. (adapt_window_size): New function. (property_changed_cb): New window/width, window/height properties. (adapt_window_size_to_control): Simplified, call adapt_window_size. * configure.in: Bumped version to 2.3.0.
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/* Eye of Gnome image viewer - utility functions for computing zoom factors
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*
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* Copyright (C) 2000 The Free Software Foundation
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*
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* Author: Federico Mena-Quintero <federico@gnu.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <config.h>
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#include <math.h>
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#include "zoom.h"
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/**
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* zoom_fit_size:
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* @dest_width: Width of destination area.
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* @dest_height: Height of destination area.
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* @src_width: Width of source image.
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* @src_height: Height of source image.
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* @upscale_smaller: Whether to scale up images smaller than the destination size.
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* @width: Return value for image width.
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* @height: Return value for image height.
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*
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* Computes the final dimensions of an image that is to be scaled to fit to a
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* certain size. If @upscale_smaller is TRUE, then images smaller than the
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* destination size will be scaled up; otherwise, they will be left at their
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* original size.
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**/
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void
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zoom_fit_size (guint dest_width, guint dest_height,
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guint src_width, guint src_height,
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gboolean upscale_smaller,
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guint *width, guint *height)
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{
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guint w, h;
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g_return_if_fail (width != NULL);
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g_return_if_fail (height != NULL);
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if (src_width == 0 || src_height == 0) {
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*width = 0;
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*height = 0;
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return;
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}
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if (src_width <= dest_width && src_height <= dest_height && !upscale_smaller) {
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*width = src_width;
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*height = src_height;
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return;
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}
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w = dest_width;
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h = floor ((double) (src_height * w) / src_width + 0.5);
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if (h > dest_height) {
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h = dest_height;
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w = floor ((double) (src_width * h) / src_height + 0.5);
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}
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g_assert (w <= dest_width);
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g_assert (h <= dest_height);
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*width = w;
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*height = h;
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}
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/**
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* zoom_fit_scale:
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* @dest_width: Width of destination area.
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* @dest_height: Height of destination area.
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* @src_width: Width of source image.
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* @src_height: Height of source image.
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* @upscale_smaller: Whether to scale up images smaller than the destination size.
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*
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* Similar to zoom_fit_size(), but returns the zoom factor of the final image
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* with respect to the original image's size.
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*
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* Return value: Zoom factor with respect to the original size.
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**/
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double
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zoom_fit_scale (guint dest_width, guint dest_height,
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guint src_width, guint src_height,
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gboolean upscale_smaller)
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{
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guint w, h;
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double wfactor, hfactor;
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double factor;
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if (src_width == 0 || src_height == 0)
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return 1.0;
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if (dest_width == 0 || dest_height == 0)
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return 0.0;
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zoom_fit_size (dest_width, dest_height, src_width, src_height, upscale_smaller, &w, &h);
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wfactor = (double) w / src_width;
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hfactor = (double) h / src_height;
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factor = MIN (wfactor, hfactor);
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return factor;
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}
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